code: def _add_features_opts(parser):
      group = parser.add_argument_group("Features")
      group.add(
          "-n_src_feats",
          "--n_src_feats",
          type=int,
          default=0,
          help="Number of source feats.",
      )
      group.add(
          "-src_feats_defaults",
          "--src_feats_defaults",
          help="Default features to apply in source in case "
          "there are not annotated",
      )
  
imports: import configargparse
  from onmt.modules.sru import CheckSRU
  from onmt.transforms import AVAILABLE_TRANSFORMS
  from onmt.constants import ModelTask
  from onmt.modules.position_ffn import ACTIVATION_FUNCTIONS
  from onmt.modules.position_ffn import ActivationFunction
  from onmt.constants import DefaultTokens
label_desc: Use image node_id 5 for calling a global function with example usage: _add_features_opts(parser) without return types